If you use a Mac, turn to our reviews of the best PDF Editor for Mac. When Do You Need a PDF Editor Software? Portable Document Format, short for PDF, offers a broad range of advantages over other types of file formats. But being able to easily edit a PDF file isn't always easy. Because PDFs are essentially images, and they are restrictive to certain changes you want to make. However, it's not... User reviews for PDFill PDF Editor Trial An excellent program and at an excellent price. I don't use .pdf files enough to want to buy a full-version of Adobe but I am an accountant and the IRS likes to use .pdf forms that can't be edited on their website.
While Foxit does charge $99 for a single license of their PDF editor, it's free to use indefinitely in their "evaluation mode." This mode adds a Foxit watermark to each page of your edited PDF.
Be sure to check them all out in '13 Free Tools for Viewing and Editing PDFs.' Adobe's Portable Document Format (PDF) has become something of a standard for sharing high quality digital documents.